Lesson 2/Learning Event 1
One of the components of the 50-GPM Pump which will require service frequently is the fuel
filter. You will have to remove and clean it. To do so, refer to figure 12.
Shut off the fuel by closing the fuel valve.
Disconnect the fuel line (figure 9 on page 33 and figure 8 B on page 32).
Loosen the thumbscrew which holds the bowl to the filter.
Swing the bail to one side and remove the bowl.
Remove the filter and clean it in dry-cleaning solvent.
Inspect the gasket and replace it if necessary.
Reassembly of the fuel filter is the reverse of the above instructions.
Gasoline Engine Assembly
Preventive maintenance on the gasoline engine is performed by organizational preventive
maintenance personnel at quarterly intervals. Deficiencies which are beyond the capability of
organizational preventive maintenance personnel must be reported to direct support maintenance.
A DA Form 2407 (Maintenance Request) is used for this purpose.
DA Form 2407. At the organizational level, DA Form 2407 is used to request repairs and
maintenance services from a higher maintenance facility.
It also is used to report
accomplishment of a Modification Work Order (MWO), to submit an Equipment Improvement
Recommendation (EIR), and to report receipt of defective material by your unit. The form may
be used to record accomplishment of maintenance actions. For your purposes, you will be
concerned with requesting repairs and maintenance services. Figure 13 on page 38 shows a
completed DA Form 2407. You will be mainly concerned with blanks 1 through 16. Not all
these blanks will apply to the pump which you are submitting for maintenance.
Organizational Preventive Maintenance Checks and Services
The organizational preventive maintenance checks and services for the 50-GPM Pump engine are
summarized in figure 14 on page 39 and are discussed in succeeding paragraphs.